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A064930 Inverse square of A034175 considered as a permutation of the nonnegative integers (which it is conjectured to be). 1
0, 1, 9, 11, 12, 40, 2, 24, 58, 25, 7, 13, 31, 32, 4, 8, 10, 57, 42, 34, 5, 3, 17, 27, 20, 102, 36, 48, 45, 14, 29, 15, 87, 6, 38, 41, 22, 37, 47, 21, 63, 30, 44, 16, 28, 103, 19, 49, 35, 112, 69, 71, 26, 18, 85, 79, 33, 43, 64, 125, 116, 59, 181, 55, 50, 105, 104, 106 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..67.

Index entries for sequences that are permutations of the natural numbers

MATHEMATICA

a[0]=b[0]=0; lst={0}; For[n=1, n<250, n++, For[s=Ceiling[Sqrt[a[n-1]]], MemberQ[lst, s^2-a[n-1]], s++, Null]; b[a[n]=s^2-a[n-1]]=n; AppendTo[lst, a[n]]]; Table[b[b[n]], {n, 0, 100}]

CROSSREFS

Sequence in context: A216292 A250295 A071217 * A158607 A070699 A065454

Adjacent sequences:  A064927 A064928 A064929 * A064931 A064932 A064933

KEYWORD

nonn,easy

AUTHOR

Dean Hickerson, Oct 14, 2001

STATUS

approved

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Last modified October 15 09:22 EDT 2019. Contains 328026 sequences. (Running on oeis4.)